From b55fdcef75ca397ed25ee3fe0e6b638f951628c5 Mon Sep 17 00:00:00 2001
From: Stephan Hadinger <stephan.hadinger@gmail.com>
Date: Mon, 18 Jan 2021 22:32:59 +0100
Subject: [PATCH] Fix compilation ESP32

---
 tasmota/xdrv_10_rules.ino | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tasmota/xdrv_10_rules.ino b/tasmota/xdrv_10_rules.ino
index 31b8e9f46..4a6d3c9c1 100644
--- a/tasmota/xdrv_10_rules.ino
+++ b/tasmota/xdrv_10_rules.ino
@@ -720,7 +720,7 @@ bool RuleSetProcess(uint8_t rule_set, String &event_saved)
       if ((ucommand.indexOf(F("IF ")) == -1) &&
           (ucommand.indexOf(F("EVENT ")) != -1) &&
           (ucommand.indexOf(F("BACKLOG ")) == -1)) {
-        commands = F("backlog ") + commands;
+        commands = String(F("backlog ")) + commands;
       }
 
       RulesVarReplace(commands, F("%VALUE%"), Rules.event_value);